Konftel 50 - Manual (Page 12)

or
0
Adjust the speaker volume in Windows

Click on the Volume... button under Sound play-
back on the tab Audio.

Adjust the sound level for Volume Control so that
it is between the intermediate and maximum level.
This setting adjusts the line output level from the
computer. A low sound level here means that you
must increase the volume on Konftel 50 to the
maximum level, which may lead to fuzzy sound and
a low sound level. A high sound level means that the
volume on Konftel 50 can be set to an intermediate
setting and still produce excellent sound through the
speakers.

Check the sound level when you playback sounds
(any sound source in the computer). Please note
that Konftel 50 must be switched on.
Note that you also have separate volume controls for
various sound sources in the computer. These volume
controls apply to playback from each sound source.
Choose
Mute for microphone input if you do not want
to hear your own voice through the speakers. A high
volume may cause echoes and feedback.
Adjusting the speaker volume on Konftel 50
If necessary, the volume on Konftel 50 can be
adjusted during a call.

Increase the speaker volume using + and reduce it
using –.
There are 5 volume settings.
USING A COMPUTER